[FFmpeg-user] Ffmpeg Nvenc GPU decode still use much more cpu resource

[unicor]

The command use a little gpu resource which show in my last picture as following:

ffmpeg -hwaccel_device 1 -hwaccel cuvid -y -i a.mkv -b:v 768k -r 25 -acodec libfdk_acc -ac 2 -b:a 96k -ar 44100 -vf ‘format=nv12,scale=854:480:force_original_aspect_ratio=decrease,pad=w=854:h=480’ -c:v h264_nvenc -gpu 1 b.mp4

Thanks a lot for your reply.

> 在 2018年12月26日，01:21，unicor <unicorok at 163.com> 写道：
> 
> 
> The command is:
> ffmpeg -hwaccel_device 1 -hwaccel cuvid -c:v h264_cuvid -y -i a.mkv -b:v 768k -r 25 -acodec libfdk_acc -ac 2 -b:a 96k -ar 44100 -vf ‘scale_npp=854:480,hwdownload,format=nv12’ -c:v h264_nvenc b.mp4
> 
> The error is:
> Bit depth 10 is not supported.
> The video probe information:
> bits_per_raw_sample=10
> 
>> 在 2018年12月26日，00:36，Carl Zwanzig <cpz at tuunq.com> 写道：
>> 
>> Hello,
>> 
>>> On 12/25/2018 8:09 AM, dd wrote:
>>> We replace cpu with gpu to ffmpeg recently, met a performance problem.
>>> As the following problem Code:
>>> ffmpeg -hwaccel_device 2 -hwaccel cuvid -i a.mp4 -vf “scale=1080:720,overlay=()” -gpu 2  -c:v h264_nvenc out.mp4
>>> it use much more cpu resource, but a little gpu, it is not we want. see the attachment picture.
>> 
>> You need to make sure you're using a current, or at least recent, version of ffmpeg and also to post the entire command output from the command you use.
>> 
>> Later,
>> 
>> z!
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